MediaWiki

Apache Server

The Apache Software Foundation provides support for the Apache community of open-source software projects. The Apache projects are characterized by a collaborative, consensus based development process, an open and pragmatic software license, and a desire to create high quality software that leads the way in its field. Apache Software Foundation consider themselves not simply a group of projects sharing a server, but rather a community of developers and users.http://www.apache.org

PHP

PHP is a widely-used open-source scripting language for server-side applications and developing dynamic web content. PHP is the result of the collective efforts of many contributors. It is licensed under a BSD-style license, the PHP license. PHP, from version 4, has been powered by the Zend engine.http://www.php.net

MySQL

MySQL is the most popular and the fastest growing Open Source SQL database management system in the industry. The MySQL software uses the GPL (GNU General Public License) to define what you may and may not do with the software in different situations.http://www.mysql.com